2002’s The Thousand Year Beach is a standalone SF novel by Tobi Hirotaka. The 2018 Anglophone edition was translated by Matt Treyvaud.
The Realm of Summer is a pleasing simulation of perfect summer in a Southern European seaside town, an idealization of something that would no doubt prove sadly flawed in real life. This perfection has been unsullied by human tourists for a thousand years (at least by the inhabitants’ virtual clocks), leaving them free to enjoy their lives without the complications humans would inflict.
All things end.